/*
 * This file is part of "JTA - Telnet/SSH for the JAVA(tm) platform".
 *
 * (c) Matthias L. Jugel, Marcus Meißner 1996-2005. All Rights Reserved.
 *
 * Please visit http://javatelnet.org/ for updates and contact.
 *
 * IMPORTANT NOTICE:
 * The code herein cannot be placed under GPL or any other license and
 * is provided as reference and to support DES encryption for communication
 * with some SSH servers. Please see license notice below for detailled
 * information.
 *
 * ---
 * Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 * ----
 */
package de.mud.ssh;

public final class DES extends Cipher {

  static {
    System.err.println("DES Cipher Copyright Eric Young.");
  }

  protected int[] key_schedule = new int[32];
  protected int IV0 = 0;
  protected int IV1 = 0;

  public synchronized void encrypt(byte[] src, int srcOff, byte[] dest, int destOff, int len) {
    int[] out = new int[2];
    int iv0 = IV0;
    int iv1 = IV1;
    int end = srcOff + len;

    for (int si = srcOff, di = destOff; si < end; si += 8, di += 8) {
      iv0 ^= ((src[si] & 0xff) | ((src[si + 1] & 0xff) << 8) |
        ((src[si + 2] & 0xff) << 16) | ((src[si + 3] & 0xff) << 24));
      iv1 ^= ((src[si + 4] & 0xff) | ((src[si + 5] & 0xff) << 8) |
        ((src[si + 6] & 0xff) << 16) | ((src[si + 7] & 0xff) << 24));
      encrypt(iv0, iv1, out);
      iv0 = out[0];
      iv1 = out[1];
      dest[di] = (byte) (iv0 & 0xff);
      dest[di + 1] = (byte) ((iv0 >>> 8) & 0xff);
      dest[di + 2] = (byte) ((iv0 >>> 16) & 0xff);
      dest[di + 3] = (byte) ((iv0 >>> 24) & 0xff);
      dest[di + 4] = (byte) (iv1 & 0xff);
      dest[di + 5] = (byte) ((iv1 >>> 8) & 0xff);
      dest[di + 6] = (byte) ((iv1 >>> 16) & 0xff);
      dest[di + 7] = (byte) ((iv1 >>> 24) & 0xff);
    }
    IV0 = iv0;
    IV1 = iv1;
  }

  public synchronized void decrypt(byte[] src, int srcOff, byte[] dest, int destOff, int len) {
    int[] out = new int[2];
    int iv0 = IV0;
    int iv1 = IV1;
    int d0;
    int d1;
    int end = srcOff + len;

    for (int si = srcOff, di = destOff; si < end; si += 8, di += 8) {
      d0 = ((src[si] & 0xff) | ((src[si + 1] & 0xff) << 8) |
        ((src[si + 2] & 0xff) << 16) | ((src[si + 3] & 0xff) << 24));
      d1 = ((src[si + 4] & 0xff) | ((src[si + 5] & 0xff) << 8) |
        ((src[si + 6] & 0xff) << 16) | ((src[si + 7] & 0xff) << 24));
      decrypt(d0, d1, out);
      iv0 ^= out[0];
      iv1 ^= out[1];
      dest[di] = (byte) (iv0 & 0xff);
      dest[di + 1] = (byte) ((iv0 >>> 8) & 0xff);
      dest[di + 2] = (byte) ((iv0 >>> 16) & 0xff);
      dest[di + 3] = (byte) ((iv0 >>> 24) & 0xff);
      dest[di + 4] = (byte) (iv1 & 0xff);
      dest[di + 5] = (byte) ((iv1 >>> 8) & 0xff);
      dest[di + 6] = (byte) ((iv1 >>> 16) & 0xff);
      dest[di + 7] = (byte) ((iv1 >>> 24) & 0xff);
      iv0 = d0;
      iv1 = d1;
    }
    IV0 = iv0;
    IV1 = iv1;
  }

  public void setKey(byte[] key) {
    int i, c, d, t, s, shifts;

    c = ((key[0] & 0xff) | ((key[1] & 0xff) << 8) |
      ((key[2] & 0xff) << 16) | ((key[3] & 0xff) << 24));
    d = ((key[4] & 0xff) | ((key[5] & 0xff) << 8) |
      ((key[6] & 0xff) << 16) | ((key[7] & 0xff) << 24));

    t = ((d >>> 4) ^ c) & 0x0f0f0f0f;
    c ^= t;
    d ^= t << 4;
    t = (((c << (16 - (-2))) ^ c) & 0xcccc0000);
    c = c ^ t ^ (t >>> (16 - (-2)));
    t = (((d << (16 - (-2))) ^ d) & 0xcccc0000);
    d = d ^ t ^ (t >>> (16 - (-2)));
    t = ((d >>> 1) ^ c) & 0x55555555;
    c ^= t;
    d ^= t << 1;
    t = ((c >>> 8) ^ d) & 0x00ff00ff;
    d ^= t;
    c ^= t << 8;
    t = ((d >>> 1) ^ c) & 0x55555555;
    c ^= t;
    d ^= t << 1;

    d = ((d & 0xff) << 16) | (d & 0xff00) |
      ((d >>> 16) & 0xff) | ((c >>> 4) & 0xf000000);
    c &= 0x0fffffff;
    shifts = 0x7efc;

    for (i = 0; i < 16; i++) {
      if ((shifts & 1) != 0) {
        c = ((c >>> 2) | (c << 26));
        d = ((d >>> 2) | (d << 26));
      } else {
        c = ((c >>> 1) | (c << 27));
        d = ((d >>> 1) | (d << 27));
      }
      shifts >>>= 1;
      c &= 0x0fffffff;
      d &= 0x0fffffff;

      s = des_skb[0][(c) & 0x3f] |
        des_skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)] |
        des_skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)] |
        des_skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06) | ((c >>> 22) & 0x38)];

      t = des_skb[4][(d) & 0x3f] |
        des_skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)] |
        des_skb[6][(d >>> 15) & 0x3f] |
        des_skb[7][((d >>> 21) & 0x0f) | ((d >>> 22) & 0x30)];

      key_schedule[i * 2] = ((t << 16) | (s & 0xffff));
      s = ((s >>> 16) | (t & 0xffff0000));
      key_schedule[(i * 2) + 1] = (s << 4) | (s >>> 28);
    }
  }

  public void encrypt(int l, int r, int[] out) {
    int t = 0, u = 0, i;

    t = ((r >>> 4) ^ l) & 0x0f0f0f0f;
    l ^= t;
    r ^= t << 4;
    t = ((l >>> 16) ^ r) & 0x0000ffff;
    r ^= t;
    l ^= t << 16;
    t = ((r >>> 2) ^ l) & 0x33333333;
    l ^= t;
    r ^= t << 2;
    t = ((l >>> 8) ^ r) & 0x00ff00ff;
    r ^= t;
    l ^= t << 8;
    t = ((r >>> 1) ^ l) & 0x55555555;
    l ^= t;
    r ^= t << 1;

    t = (r << 1) | (r >>> 31);
    r = (l << 1) | (l >>> 31);
    l = t;

    for (i = 0; i < 32; i += 4) {
      u = r ^ key_schedule[i];
      t = r ^ key_schedule[i + 1];
      t = ((t >>> 4) + (t << 28));
      l ^=
        (des_SPtrans[1][(t) & 0x3f] | des_SPtrans[3][(t >>> 8) & 0x3f] |
        des_SPtrans[5][(t >>> 16) & 0x3f] | des_SPtrans[7][(t >>> 24) & 0x3f] |
        des_SPtrans[0][(u) & 0x3f] | des_SPtrans[2][(u >>> 8) & 0x3f] |
        des_SPtrans[4][(u >>> 16) & 0x3f] | des_SPtrans[6][(u >>> 24) & 0x3f]);

      u = l ^ key_schedule[i + 2];
      t = l ^ key_schedule[i + 3];
      t = ((t >>> 4) + (t << 28));
      r ^=
        (des_SPtrans[1][(t) & 0x3f] | des_SPtrans[3][(t >>> 8) & 0x3f] |
        des_SPtrans[5][(t >>> 16) & 0x3f] | des_SPtrans[7][(t >>> 24) & 0x3f] |
        des_SPtrans[0][(u) & 0x3f] | des_SPtrans[2][(u >>> 8) & 0x3f] |
        des_SPtrans[4][(u >>> 16) & 0x3f] | des_SPtrans[6][(u >>> 24) & 0x3f]);
    }

    l = (l >>> 1) | (l << 31);
    r = (r >>> 1) | (r << 31);

    t = ((r >>> 1) ^ l) & 0x55555555;
    l ^= t;
    r ^= t << 1;
    t = ((l >>> 8) ^ r) & 0x00ff00ff;
    r ^= t;
    l ^= t << 8;
    t = ((r >>> 2) ^ l) & 0x33333333;
    l ^= t;
    r ^= t << 2;
    t = ((l >>> 16) ^ r) & 0x0000ffff;
    r ^= t;
    l ^= t << 16;
    t = ((r >>> 4) ^ l) & 0x0f0f0f0f;
    l ^= t;
    r ^= t << 4;

    out[0] = l;
    out[1] = r;
  }

  public void decrypt(int l, int r, int[] out) {
    int t, u, i;

    t = ((r >>> 4) ^ l) & 0x0f0f0f0f;
    l ^= t;
    r ^= t << 4;
    t = ((l >>> 16) ^ r) & 0x0000ffff;
    r ^= t;
    l ^= t << 16;
    t = ((r >>> 2) ^ l) & 0x33333333;
    l ^= t;
    r ^= t << 2;
    t = ((l >>> 8) ^ r) & 0x00ff00ff;
    r ^= t;
    l ^= t << 8;
    t = ((r >>> 1) ^ l) & 0x55555555;
    l ^= t;
    r ^= t << 1;

    t = (r << 1) | (r >>> 31);
    r = (l << 1) | (l >>> 31);
    l = t;

    for (i = 30; i > 0; i -= 4) {
      u = r ^ key_schedule[i];
      t = r ^ key_schedule[i + 1];
      t = ((t >>> 4) + (t << 28));
      l ^=
        (des_SPtrans[1][(t) & 0x3f] | des_SPtrans[3][(t >>> 8) & 0x3f] |
        des_SPtrans[5][(t >>> 16) & 0x3f] | des_SPtrans[7][(t >>> 24) & 0x3f] |
        des_SPtrans[0][(u) & 0x3f] | des_SPtrans[2][(u >>> 8) & 0x3f] |
        des_SPtrans[4][(u >>> 16) & 0x3f] | des_SPtrans[6][(u >>> 24) & 0x3f]);

      u = l ^ key_schedule[i - 2];
      t = l ^ key_schedule[i - 1];
      t = ((t >>> 4) + (t << 28));
      r ^=
        (des_SPtrans[1][(t) & 0x3f] | des_SPtrans[3][(t >>> 8) & 0x3f] |
        des_SPtrans[5][(t >>> 16) & 0x3f] | des_SPtrans[7][(t >>> 24) & 0x3f] |
        des_SPtrans[0][(u) & 0x3f] | des_SPtrans[2][(u >>> 8) & 0x3f] |
        des_SPtrans[4][(u >>> 16) & 0x3f] | des_SPtrans[6][(u >>> 24) & 0x3f]);
    }

    l = (l >>> 1) | (l << 31);
    r = (r >>> 1) | (r << 31);

    t = ((r >>> 1) ^ l) & 0x55555555;
    l ^= t;
    r ^= t << 1;
    t = ((l >>> 8) ^ r) & 0x00ff00ff;
    r ^= t;
    l ^= t << 8;
    t = ((r >>> 2) ^ l) & 0x33333333;
    l ^= t;
    r ^= t << 2;
    t = ((l >>> 16) ^ r) & 0x0000ffff;
    r ^= t;
    l ^= t << 16;
    t = ((r >>> 4) ^ l) & 0x0f0f0f0f;
    l ^= t;
    r ^= t << 4;

    out[0] = l;
    out[1] = r;
  }

  /* Table for key generation.  This used to be in sk.h.
   * Copyright (C) 1993 Eric Young - see README for more details
   */
  final static int des_skb[][] = {
    /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
    {0x00000000, 0x00000010, 0x20000000, 0x20000010,
     0x00010000, 0x00010010, 0x20010000, 0x20010010,
     0x00000800, 0x00000810, 0x20000800, 0x20000810,
     0x00010800, 0x00010810, 0x20010800, 0x20010810,
     0x00000020, 0x00000030, 0x20000020, 0x20000030,
     0x00010020, 0x00010030, 0x20010020, 0x20010030,
     0x00000820, 0x00000830, 0x20000820, 0x20000830,
     0x00010820, 0x00010830, 0x20010820, 0x20010830,
     0x00080000, 0x00080010, 0x20080000, 0x20080010,
     0x00090000, 0x00090010, 0x20090000, 0x20090010,
     0x00080800, 0x00080810, 0x20080800, 0x20080810,
     0x00090800, 0x00090810, 0x20090800, 0x20090810,
     0x00080020, 0x00080030, 0x20080020, 0x20080030,
     0x00090020, 0x00090030, 0x20090020, 0x20090030,
     0x00080820, 0x00080830, 0x20080820, 0x20080830,
     0x00090820, 0x00090830, 0x20090820, 0x20090830},
    /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
    {0x00000000, 0x02000000, 0x00002000, 0x02002000,
     0x00200000, 0x02200000, 0x00202000, 0x02202000,
     0x00000004, 0x02000004, 0x00002004, 0x02002004,
     0x00200004, 0x02200004, 0x00202004, 0x02202004,
     0x00000400, 0x02000400, 0x00002400, 0x02002400,
     0x00200400, 0x02200400, 0x00202400, 0x02202400,
     0x00000404, 0x02000404, 0x00002404, 0x02002404,
     0x00200404, 0x02200404, 0x00202404, 0x02202404,
     0x10000000, 0x12000000, 0x10002000, 0x12002000,
     0x10200000, 0x12200000, 0x10202000, 0x12202000,
     0x10000004, 0x12000004, 0x10002004, 0x12002004,
     0x10200004, 0x12200004, 0x10202004, 0x12202004,
     0x10000400, 0x12000400, 0x10002400, 0x12002400,
     0x10200400, 0x12200400, 0x10202400, 0x12202400,
     0x10000404, 0x12000404, 0x10002404, 0x12002404,
     0x10200404, 0x12200404, 0x10202404, 0x12202404},
    /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
    {0x00000000, 0x00000001, 0x00040000, 0x00040001,
     0x01000000, 0x01000001, 0x01040000, 0x01040001,
     0x00000002, 0x00000003, 0x00040002, 0x00040003,
     0x01000002, 0x01000003, 0x01040002, 0x01040003,
     0x00000200, 0x00000201, 0x00040200, 0x00040201,
     0x01000200, 0x01000201, 0x01040200, 0x01040201,
     0x00000202, 0x00000203, 0x00040202, 0x00040203,
     0x01000202, 0x01000203, 0x01040202, 0x01040203,
     0x08000000, 0x08000001, 0x08040000, 0x08040001,
     0x09000000, 0x09000001, 0x09040000, 0x09040001,
     0x08000002, 0x08000003, 0x08040002, 0x08040003,
     0x09000002, 0x09000003, 0x09040002, 0x09040003,
     0x08000200, 0x08000201, 0x08040200, 0x08040201,
     0x09000200, 0x09000201, 0x09040200, 0x09040201,
     0x08000202, 0x08000203, 0x08040202, 0x08040203,
     0x09000202, 0x09000203, 0x09040202, 0x09040203},
    /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
    {0x00000000, 0x00100000, 0x00000100, 0x00100100,
     0x00000008, 0x00100008, 0x00000108, 0x00100108,
     0x00001000, 0x00101000, 0x00001100, 0x00101100,
     0x00001008, 0x00101008, 0x00001108, 0x00101108,
     0x04000000, 0x04100000, 0x04000100, 0x04100100,
     0x04000008, 0x04100008, 0x04000108, 0x04100108,
     0x04001000, 0x04101000, 0x04001100, 0x04101100,
     0x04001008, 0x04101008, 0x04001108, 0x04101108,
     0x00020000, 0x00120000, 0x00020100, 0x00120100,
     0x00020008, 0x00120008, 0x00020108, 0x00120108,
     0x00021000, 0x00121000, 0x00021100, 0x00121100,
     0x00021008, 0x00121008, 0x00021108, 0x00121108,
     0x04020000, 0x04120000, 0x04020100, 0x04120100,
     0x04020008, 0x04120008, 0x04020108, 0x04120108,
     0x04021000, 0x04121000, 0x04021100, 0x04121100,
     0x04021008, 0x04121008, 0x04021108, 0x04121108},
    /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
    {0x00000000, 0x10000000, 0x00010000, 0x10010000,
     0x00000004, 0x10000004, 0x00010004, 0x10010004,
     0x20000000, 0x30000000, 0x20010000, 0x30010000,
     0x20000004, 0x30000004, 0x20010004, 0x30010004,
     0x00100000, 0x10100000, 0x00110000, 0x10110000,
     0x00100004, 0x10100004, 0x00110004, 0x10110004,
     0x20100000, 0x30100000, 0x20110000, 0x30110000,
     0x20100004, 0x30100004, 0x20110004, 0x30110004,
     0x00001000, 0x10001000, 0x00011000, 0x10011000,
     0x00001004, 0x10001004, 0x00011004, 0x10011004,
     0x20001000, 0x30001000, 0x20011000, 0x30011000,
     0x20001004, 0x30001004, 0x20011004, 0x30011004,
     0x00101000, 0x10101000, 0x00111000, 0x10111000,
     0x00101004, 0x10101004, 0x00111004, 0x10111004,
     0x20101000, 0x30101000, 0x20111000, 0x30111000,
     0x20101004, 0x30101004, 0x20111004, 0x30111004},
    /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
    {0x00000000, 0x08000000, 0x00000008, 0x08000008,
     0x00000400, 0x08000400, 0x00000408, 0x08000408,
     0x00020000, 0x08020000, 0x00020008, 0x08020008,
     0x00020400, 0x08020400, 0x00020408, 0x08020408,
     0x00000001, 0x08000001, 0x00000009, 0x08000009,
     0x00000401, 0x08000401, 0x00000409, 0x08000409,
     0x00020001, 0x08020001, 0x00020009, 0x08020009,
     0x00020401, 0x08020401, 0x00020409, 0x08020409,
     0x02000000, 0x0A000000, 0x02000008, 0x0A000008,
     0x02000400, 0x0A000400, 0x02000408, 0x0A000408,
     0x02020000, 0x0A020000, 0x02020008, 0x0A020008,
     0x02020400, 0x0A020400, 0x02020408, 0x0A020408,
     0x02000001, 0x0A000001, 0x02000009, 0x0A000009,
     0x02000401, 0x0A000401, 0x02000409, 0x0A000409,
     0x02020001, 0x0A020001, 0x02020009, 0x0A020009,
     0x02020401, 0x0A020401, 0x02020409, 0x0A020409},
    /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
    {0x00000000, 0x00000100, 0x00080000, 0x00080100,
     0x01000000, 0x01000100, 0x01080000, 0x01080100,
     0x00000010, 0x00000110, 0x00080010, 0x00080110,
     0x01000010, 0x01000110, 0x01080010, 0x01080110,
     0x00200000, 0x00200100, 0x00280000, 0x00280100,
     0x01200000, 0x01200100, 0x01280000, 0x01280100,
     0x00200010, 0x00200110, 0x00280010, 0x00280110,
     0x01200010, 0x01200110, 0x01280010, 0x01280110,
     0x00000200, 0x00000300, 0x00080200, 0x00080300,
     0x01000200, 0x01000300, 0x01080200, 0x01080300,
     0x00000210, 0x00000310, 0x00080210, 0x00080310,
     0x01000210, 0x01000310, 0x01080210, 0x01080310,
     0x00200200, 0x00200300, 0x00280200, 0x00280300,
     0x01200200, 0x01200300, 0x01280200, 0x01280300,
     0x00200210, 0x00200310, 0x00280210, 0x00280310,
     0x01200210, 0x01200310, 0x01280210, 0x01280310},
    /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
    {0x00000000, 0x04000000, 0x00040000, 0x04040000,
     0x00000002, 0x04000002, 0x00040002, 0x04040002,
     0x00002000, 0x04002000, 0x00042000, 0x04042000,
     0x00002002, 0x04002002, 0x00042002, 0x04042002,
     0x00000020, 0x04000020, 0x00040020, 0x04040020,
     0x00000022, 0x04000022, 0x00040022, 0x04040022,
     0x00002020, 0x04002020, 0x00042020, 0x04042020,
     0x00002022, 0x04002022, 0x00042022, 0x04042022,
     0x00000800, 0x04000800, 0x00040800, 0x04040800,
     0x00000802, 0x04000802, 0x00040802, 0x04040802,
     0x00002800, 0x04002800, 0x00042800, 0x04042800,
     0x00002802, 0x04002802, 0x00042802, 0x04042802,
     0x00000820, 0x04000820, 0x00040820, 0x04040820,
     0x00000822, 0x04000822, 0x00040822, 0x04040822,
     0x00002820, 0x04002820, 0x00042820, 0x04042820,
     0x00002822, 0x04002822, 0x00042822, 0x04042822}
  };

  /* Tables used for executing des.  This used to be in spr.h.
   * Copyright (C) 1993 Eric Young - see README for more details
   */
  final static int des_SPtrans[][] = {
    /* nibble 0 */
    {0x00820200, 0x00020000, 0x80800000, 0x80820200,
     0x00800000, 0x80020200, 0x80020000, 0x80800000,
     0x80020200, 0x00820200, 0x00820000, 0x80000200,
     0x80800200, 0x00800000, 0x00000000, 0x80020000,
     0x00020000, 0x80000000, 0x00800200, 0x00020200,
     0x80820200, 0x00820000, 0x80000200, 0x00800200,
     0x80000000, 0x00000200, 0x00020200, 0x80820000,
     0x00000200, 0x80800200, 0x80820000, 0x00000000,
     0x00000000, 0x80820200, 0x00800200, 0x80020000,
     0x00820200, 0x00020000, 0x80000200, 0x00800200,
     0x80820000, 0x00000200, 0x00020200, 0x80800000,
     0x80020200, 0x80000000, 0x80800000, 0x00820000,
     0x80820200, 0x00020200, 0x00820000, 0x80800200,
     0x00800000, 0x80000200, 0x80020000, 0x00000000,
     0x00020000, 0x00800000, 0x80800200, 0x00820200,
     0x80000000, 0x80820000, 0x00000200, 0x80020200},

    /* nibble 1 */
    {0x10042004, 0x00000000, 0x00042000, 0x10040000,
     0x10000004, 0x00002004, 0x10002000, 0x00042000,
     0x00002000, 0x10040004, 0x00000004, 0x10002000,
     0x00040004, 0x10042000, 0x10040000, 0x00000004,
     0x00040000, 0x10002004, 0x10040004, 0x00002000,
     0x00042004, 0x10000000, 0x00000000, 0x00040004,
     0x10002004, 0x00042004, 0x10042000, 0x10000004,
     0x10000000, 0x00040000, 0x00002004, 0x10042004,
     0x00040004, 0x10042000, 0x10002000, 0x00042004,
     0x10042004, 0x00040004, 0x10000004, 0x00000000,
     0x10000000, 0x00002004, 0x00040000, 0x10040004,
     0x00002000, 0x10000000, 0x00042004, 0x10002004,
     0x10042000, 0x00002000, 0x00000000, 0x10000004,
     0x00000004, 0x10042004, 0x00042000, 0x10040000,
     0x10040004, 0x00040000, 0x00002004, 0x10002000,
     0x10002004, 0x00000004, 0x10040000, 0x00042000},

    /* nibble 2 */
    {0x41000000, 0x01010040, 0x00000040, 0x41000040,
     0x40010000, 0x01000000, 0x41000040, 0x00010040,
     0x01000040, 0x00010000, 0x01010000, 0x40000000,
     0x41010040, 0x40000040, 0x40000000, 0x41010000,
     0x00000000, 0x40010000, 0x01010040, 0x00000040,
     0x40000040, 0x41010040, 0x00010000, 0x41000000,
     0x41010000, 0x01000040, 0x40010040, 0x01010000,
     0x00010040, 0x00000000, 0x01000000, 0x40010040,
     0x01010040, 0x00000040, 0x40000000, 0x00010000,
     0x40000040, 0x40010000, 0x01010000, 0x41000040,
     0x00000000, 0x01010040, 0x00010040, 0x41010000,
     0x40010000, 0x01000000, 0x41010040, 0x40000000,
     0x40010040, 0x41000000, 0x01000000, 0x41010040,
     0x00010000, 0x01000040, 0x41000040, 0x00010040,
     0x01000040, 0x00000000, 0x41010000, 0x40000040,
     0x41000000, 0x40010040, 0x00000040, 0x01010000},

    /* nibble 3 */
    {0x00100402, 0x04000400, 0x00000002, 0x04100402,
     0x00000000, 0x04100000, 0x04000402, 0x00100002,
     0x04100400, 0x04000002, 0x04000000, 0x00000402,
     0x04000002, 0x00100402, 0x00100000, 0x04000000,
     0x04100002, 0x00100400, 0x00000400, 0x00000002,
     0x00100400, 0x04000402, 0x04100000, 0x00000400,
     0x00000402, 0x00000000, 0x00100002, 0x04100400,
     0x04000400, 0x04100002, 0x04100402, 0x00100000,
     0x04100002, 0x00000402, 0x00100000, 0x04000002,
     0x00100400, 0x04000400, 0x00000002, 0x04100000,
     0x04000402, 0x00000000, 0x00000400, 0x00100002,
     0x00000000, 0x04100002, 0x04100400, 0x00000400,
     0x04000000, 0x04100402, 0x00100402, 0x00100000,
     0x04100402, 0x00000002, 0x04000400, 0x00100402,
     0x00100002, 0x00100400, 0x04100000, 0x04000402,
     0x00000402, 0x04000000, 0x04000002, 0x04100400},

    /* nibble 4 */
    {0x02000000, 0x00004000, 0x00000100, 0x02004108,
     0x02004008, 0x02000100, 0x00004108, 0x02004000,
     0x00004000, 0x00000008, 0x02000008, 0x00004100,
     0x02000108, 0x02004008, 0x02004100, 0x00000000,
     0x00004100, 0x02000000, 0x00004008, 0x00000108,
     0x02000100, 0x00004108, 0x00000000, 0x02000008,
     0x00000008, 0x02000108, 0x02004108, 0x00004008,
     0x02004000, 0x00000100, 0x00000108, 0x02004100,
     0x02004100, 0x02000108, 0x00004008, 0x02004000,
     0x00004000, 0x00000008, 0x02000008, 0x02000100,
     0x02000000, 0x00004100, 0x02004108, 0x00000000,
     0x00004108, 0x02000000, 0x00000100, 0x00004008,
     0x02000108, 0x00000100, 0x00000000, 0x02004108,
     0x02004008, 0x02004100, 0x00000108, 0x00004000,
     0x00004100, 0x02004008, 0x02000100, 0x00000108,
     0x00000008, 0x00004108, 0x02004000, 0x02000008},

    /* nibble 5 */
    {0x20000010, 0x00080010, 0x00000000, 0x20080800,
     0x00080010, 0x00000800, 0x20000810, 0x00080000,
     0x00000810, 0x20080810, 0x00080800, 0x20000000,
     0x20000800, 0x20000010, 0x20080000, 0x00080810,
     0x00080000, 0x20000810, 0x20080010, 0x00000000,
     0x00000800, 0x00000010, 0x20080800, 0x20080010,
     0x20080810, 0x20080000, 0x20000000, 0x00000810,
     0x00000010, 0x00080800, 0x00080810, 0x20000800,
     0x00000810, 0x20000000, 0x20000800, 0x00080810,
     0x20080800, 0x00080010, 0x00000000, 0x20000800,
     0x20000000, 0x00000800, 0x20080010, 0x00080000,
     0x00080010, 0x20080810, 0x00080800, 0x00000010,
     0x20080810, 0x00080800, 0x00080000, 0x20000810,
     0x20000010, 0x20080000, 0x00080810, 0x00000000,
     0x00000800, 0x20000010, 0x20000810, 0x20080800,
     0x20080000, 0x00000810, 0x00000010, 0x20080010},

    /* nibble 6 */
    {0x00001000, 0x00000080, 0x00400080, 0x00400001,
     0x00401081, 0x00001001, 0x00001080, 0x00000000,
     0x00400000, 0x00400081, 0x00000081, 0x00401000,
     0x00000001, 0x00401080, 0x00401000, 0x00000081,
     0x00400081, 0x00001000, 0x00001001, 0x00401081,
     0x00000000, 0x00400080, 0x00400001, 0x00001080,
     0x00401001, 0x00001081, 0x00401080, 0x00000001,
     0x00001081, 0x00401001, 0x00000080, 0x00400000,
     0x00001081, 0x00401000, 0x00401001, 0x00000081,
     0x00001000, 0x00000080, 0x00400000, 0x00401001,
     0x00400081, 0x00001081, 0x00001080, 0x00000000,
     0x00000080, 0x00400001, 0x00000001, 0x00400080,
     0x00000000, 0x00400081, 0x00400080, 0x00001080,
     0x00000081, 0x00001000, 0x00401081, 0x00400000,
     0x00401080, 0x00000001, 0x00001001, 0x00401081,
     0x00400001, 0x00401080, 0x00401000, 0x00001001},

    /* nibble 7 */
    {0x08200020, 0x08208000, 0x00008020, 0x00000000,
     0x08008000, 0x00200020, 0x08200000, 0x08208020,
     0x00000020, 0x08000000, 0x00208000, 0x00008020,
     0x00208020, 0x08008020, 0x08000020, 0x08200000,
     0x00008000, 0x00208020, 0x00200020, 0x08008000,
     0x08208020, 0x08000020, 0x00000000, 0x00208000,
     0x08000000, 0x00200000, 0x08008020, 0x08200020,
     0x00200000, 0x00008000, 0x08208000, 0x00000020,
     0x00200000, 0x00008000, 0x08000020, 0x08208020,
     0x00008020, 0x08000000, 0x00000000, 0x00208000,
     0x08200020, 0x08008020, 0x08008000, 0x00200020,
     0x08208000, 0x00000020, 0x00200020, 0x08008000,
     0x08208020, 0x00200000, 0x08200000, 0x08000020,
     0x00208000, 0x00008020, 0x08008020, 0x08200000,
     0x00000020, 0x08208000, 0x00208020, 0x00000000,
     0x08000000, 0x08200020, 0x00008000, 0x00208020}
  };

}
